package com.example.ross.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * @version 1.0.0
 * @className: FastJsonRedisSerializer
 * @description: Redis使用FastJson序列化
 * @author: zhangjunfa
 * @date: 2023/5/6 14:40
 */
public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {
    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    static {
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
    }

    public FastJsonRedisSerializer(Class<T> clazz) {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if (t != null) {
            return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
        }
        return new byte[0];
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (bytes != null && bytes.length != 0) {
            String str = new String(bytes, DEFAULT_CHARSET);
            return JSON.parseObject(str, clazz);
        }
        return null;
    }

    protected JavaType getJavaType(Class<?> clazz) {
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
